Android ActionBar 讲解

1.Action Bar 介绍

我们能在应用中看见的actionbar一般就是下图的样子，比如快图应用



1.App icon 应用的图标，左侧带应用相当于back返回键

2.ViewControl

3.Action button 相当于普通的Button可以监听点击事件

4.Action overflow 三个点，相当于手机上的menu键，可以显示隐藏的action button

下面是一个简单的关于Action Bar的例子：

[java] view
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package com.example.demo_actionbarbasic;

import com.example.demo_actionbarbasic.R;

import android.app.ActionBar;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

public class MainActivity extends Activity {

private MenuItem menuItem = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// 通过hilde()和show()方法可以控制actionbar的隐藏和显示

// ActionBar actionBar = getActionBar();

// actionBar.hide();

// actionBar.show();

}

// 我们可以看到，actonbar的用法跟选项菜单是一样的

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case R.id.action_refresh:

Toast.makeText(this, "Menu Item refresh selected",

Toast.LENGTH_SHORT).show();

break;

case R.id.action_about:

Toast.makeText(this, "Menu Item about selected", Toast.LENGTH_SHORT)

.show();

break;

case R.id.action_edit:

Toast.makeText(this, "Menu Item edit selected", Toast.LENGTH_SHORT)

.show();

break;

case R.id.action_search:

Toast.makeText(this, "Menu Item search selected",

Toast.LENGTH_SHORT).show();

break;

case R.id.action_help:

Toast.makeText(this, "Menu Item settings selected",

Toast.LENGTH_SHORT).show();

break;

default:

break;

}

return super.onOptionsItemSelected(item);

}

}

[html] view
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<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item

android:id="@+id/menu_settings"

android:orderInCategory="100"

android:showAsAction="never"

android:title="settings"/>

<item

android:id="@+id/action_refresh"

android:icon="@drawable/navigation_refresh"

android:orderInCategory="101"

android:showAsAction="ifRoom|withText"

android:title="refresh"/>

<item

android:id="@+id/action_about"

android:icon="@drawable/action_about"

android:orderInCategory="101"

android:showAsAction="ifRoom"

android:title="about"/>

<item

android:id="@+id/action_search"

android:icon="@drawable/action_search"

android:orderInCategory="103"

android:showAsAction="ifRoom"/>

<item

android:id="@+id/action_edit"

android:icon="@android:drawable/ic_menu_edit"

android:orderInCategory="105"

android:showAsAction="ifRoom"

android:title="edit"/>

<item

android:id="@+id/action_help"

android:showAsAction="always"

android:title="help"/>

<item

android:id="@+id/action_email"

android:icon="@android:drawable/ic_dialog_email"

android:orderInCategory="106"

android:showAsAction="ifRoom"

android:title="email"/>

</menu>

onCreateOptionsMenu()方法用来加载menu文件夹中定义的xml文件，用来显示action bar。onOptionsItemSelected()方法用来加入点击事件。

效果图：





左图的效果我们看到只能显示两个action button，由于屏幕的空间有限，其他的action button会被隐藏。横屏的时候我们可以显示4个，还有3个被隐藏起来了。当我们按手机上的更多键时可以显示出来关于action button的文字信息，一定要在item标签中加入title属性。

android:showAsAction="ifRoom"ifRomm表示有空间的时候显示。

android:showAsAction="always"表示总是显示

android:showAsAction="ifRoom|withText"有空间的时候同时显示title标题
其他属性可以自己试试。

2.显示3个点的更多action button

从上面的代码我们知道，即使我们横屏也显示不出全部action button。我们可以加入3个点的action button来用下拉显示的方式，显示跟多的action button。在网上的信息得知，只要你的手机有menu键actionbar就不会显示3个点的更多或者说3个点的menu按钮。从上面的代码我们知道，即使我们横屏也显示不出全部action button。我们可以加入3个点的action button来用下拉显示的方式，显示跟多的action button。在网上的信息得知，只要你的手机有menu键actionbar就不会显示3个点的更多或者说3个点的menu按钮。

[java] view
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private void getOverflowMenu() {

try {

ViewConfiguration config = ViewConfiguration.get(this);

Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");

if(menuKeyField != null) {

menuKeyField.setAccessible(true);

menuKeyField.setBoolean(config, false);

}

} catch (Exception e) {

e.printStackTrace();

}

}

在onCreat（）方法中调用这个方法可以显示3个点的menu按钮。下图是按下3个点的action button的效果



代码：Demo_ActionBar3dot

动态action button

用到了MenuItem 类的，setActionView()和collapseActionView()这两个方法。 这个例子的效果是当我们点击refresh action button的时候会显示进度条。

[java] view
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package com.example.demo_actionbar;

import android.app.ActionBar;

import android.app.Activity;

import android.content.Intent;

import android.os.AsyncTask;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.EditText;

import android.widget.ProgressBar;

import android.widget.TextView;

import android.widget.TextView.OnEditorActionListener;

import android.widget.Toast;

public class MainActivity extends Activity {

private MenuItem menuItem = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

// TODO Auto-generated method stub

switch (item.getItemId()) {

case R.id.action_refresh:

menuItem = item;

menuItem.setActionView(R.layout.progressbar);

TestTask task = new TestTask();

task.execute("test");

break;

case R.id.action_about:

Toast.makeText(this, "Menu Item about selected", Toast.LENGTH_SHORT)

.show();

break;

default:

break;

}

return super.onOptionsItemSelected(item);

}

private class TestTask extends AsyncTask<String, Void, String> {

@Override

protected String doInBackground(String... params) {

// Simulate something long running

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

e.printStackTrace();

}

return null;

}

@Override

protected void onPostExecute(String result) {

menuItem.collapseActionView(); // 这个方法需要 API 14 以上

menuItem.setActionView(null);

}

};

}

Actionbar之spinner实现drop-down Navigation

1.首先需要一个SpinnerAdapter设置下拉item的内容和显示的layout

2.实现ActionBar.OnNavigationListener这个接口，接口中有点击item的事件

3.设置navigation mode例如

ActionBar actionBar = getActionBar();

actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);

4.用 setListNavigationCallbacks()方法来实现下拉选项，例如

actionBar.setListNavigationCallbacks(mSpinnerAdapter, mNavigationCallback);

效果图：



代码：

[java] view
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package in.wptrafficanalyzer.actionbardropdownnavigation;

import android.app.ActionBar;

import android.app.ActionBar.OnNavigationListener;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.Toast;

public class MainActivity extends Activity {

/** An array of strings to populate dropdown list */

String[] actions = new String[] { "Bookmark", "Subscribe", "Share" };

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

/** Create an array adapter to populate dropdownlist */

ArrayAdapter<String> adapter = new ArrayAdapter<String>(

getBaseContext(),

android.R.layout.simple_spinner_dropdown_item, actions);

/** Enabling dropdown list navigation for the action bar */

getActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);

/** Defining Navigation listener */

ActionBar.OnNavigationListener navigationListener = new OnNavigationListener() {

@Override

public boolean onNavigationItemSelected(int itemPosition,

long itemId) {

Toast.makeText(getBaseContext(),

"You selected : " + actions[itemPosition],

Toast.LENGTH_SHORT).show();

return false;

}

};

/**

* Setting dropdown items and item navigation listener for the actionbar

*/

getActionBar().setListNavigationCallbacks(adapter, navigationListener);

}

}

代码下载：Demo_ActionBarDropdownNavigation

Action Bar之Contextual action bar





两张图，前一张是没有显示contextual action bar 的时候，后面那张是用户长点击EditText显示contextual action bar的效果。contextual action bar 也能加入menu item 并对menu item 进行监听。在contextual action bar 中显示 menu item 需要在 /res/menu/ 文件夹中加入布局文件。

代码：

[java] view
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package com.example.demo_actionbarcontextual;

import com.example.demo_actionbarcontextual.R;

import android.app.Activity;

import android.os.Bundle;

import android.view.ActionMode;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.widget.Toast;

public class MainActivity extends Activity {

protected Object mActionMode;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

View view = findViewById(R.id.myView);

// 对EditText设置长点击事件，用来显示 contextual action bar

view.setOnLongClickListener(new View.OnLongClickListener() {

public boolean onLongClick(View view) {

if (mActionMode != null) {

return false;

}

// Start the Contextual Action Bar using the ActionMode.Callback defined above

mActionMode = MainActivity.this

.startActionMode(mActionModeCallback);

view.setSelected(true);

return true;

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

MenuInflater inflater = getMenuInflater();

inflater.inflate(R.menu.mainmenu, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

Toast.makeText(this, "Just a test", Toast.LENGTH_SHORT).show();

return true;

}

private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {

// Called when the action mode is created; startActionMode() was called

public boolean onCreateActionMode(ActionMode mode, Menu menu) {

// Inflate a menu resource providing context menu items

MenuInflater inflater = mode.getMenuInflater();

// R.menu.contextual 是 contextual action bar 的布局文件， 在 /res/menu/ 文件夹下

inflater.inflate(R.menu.contextual, menu);

return true;

}

// Called each time the action mode is shown. Always called after

// onCreateActionMode, but

// may be called multiple times if the mode is invalidated.

public boolean onPrepareActionMode(ActionMode mode, Menu menu) {

return false; // Return false if nothing is done

}

// 当用户点击 contextual action bar 的 menu item 的时候产生点击事件

public boolean onActionItemClicked(ActionMode mode, MenuItem item) {

switch (item.getItemId()) {

case R.id.toast:

Toast.makeText(MainActivity.this, "Selected menu",

Toast.LENGTH_LONG).show();

mode.finish(); // 关闭 contextual action bar

return true;

default:

return false;

}

}

// Called when the user exits the action mode

public void onDestroyActionMode(ActionMode mode) {

mActionMode = null;

}

};

}

下载：Demo_ActionBarContextual

Action bar 之 navigation tabs

左图是竖直屏幕的效果，右图是横屏的效果:





代码：

[java] view
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package de.arvidg.exampleactionbartabs;

import android.app.ActionBar;

import android.app.ActionBar.Tab;

import android.app.Activity;

import android.app.Fragment;

import android.app.FragmentTransaction;

import android.content.Context;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.widget.Toast;

public class StartActivity extends Activity {

public static Context appContext;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

appContext = getApplicationContext();

// ActionBar

ActionBar actionbar = getActionBar();

// 设置action bar 的 navigation mode

actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

// 添加 action bar 的 tabs

ActionBar.Tab PlayerTab = actionbar.newTab().setText("Fragment A");

ActionBar.Tab StationsTab = actionbar.newTab().setText("Fragment B");

// 实例化 fragment action bar 是用 fragment 来显示的

Fragment PlayerFragment = new AFragment();

Fragment StationsFragment = new BFragment();

// 对 tabs 设置监听事件

PlayerTab.setTabListener(new MyTabsListener(PlayerFragment));

StationsTab.setTabListener(new MyTabsListener(StationsFragment));

// 最后把 tabs 加入监听事件

actionbar.addTab(PlayerTab);

actionbar.addTab(StationsTab);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

MenuInflater inflater = getMenuInflater();

inflater.inflate(R.menu.main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case R.id.menuitem_search:

Toast.makeText(appContext, "search", Toast.LENGTH_SHORT).show();

return true;

case R.id.menuitem_add:

Toast.makeText(appContext, "add", Toast.LENGTH_SHORT).show();

return true;

case R.id.menuitem_share:

Toast.makeText(appContext, "share", Toast.LENGTH_SHORT).show();

return true;

case R.id.menuitem_feedback:

Toast.makeText(appContext, "feedback", Toast.LENGTH_SHORT).show();

return true;

case R.id.menuitem_about:

Toast.makeText(appContext, "about", Toast.LENGTH_SHORT).show();

return true;

case R.id.menuitem_quit:

Toast.makeText(appContext, "quit", Toast.LENGTH_SHORT).show();

return true;

}

return false;

}

// @Override

// protected void onSaveInstanceState(Bundle outState) {

// super.onSaveInstanceState(outState);

// outState.putInt("tab", getActionBar().getSelectedNavigationIndex());

// }

}

// 实例化 tabs 的监听类

class MyTabsListener implements ActionBar.TabListener {

public Fragment fragment;

// 传入监听的 tab 的 fragment

public MyTabsListener(Fragment fragment) {

this.fragment = fragment;

}

// 重复两次以上点击 tab

@Override

public void onTabReselected(Tab tab, FragmentTransaction ft) { // ft 用来控制 fragment

Toast.makeText(StartActivity.appContext, "Reselected!",

Toast.LENGTH_SHORT).show();

}

// 就点击一次

@Override

public void onTabSelected(Tab tab, FragmentTransaction ft) {

ft.replace(R.id.fragment_container, fragment);

}

// 不点击

@Override

public void onTabUnselected(Tab tab, FragmentTransaction ft) {

ft.remove(fragment);

}

Action bar 之 ShareActionProvider

1.首先要在menu布局文件的item标签中加入

android:actionProviderClass="android.widget.ShareActionProvider"

2.得到ShareActionProvider的实例

provider = (ShareActionProvider) menu.findItem(R.id.menu_share)

.getActionProvider();

3.设置Intent

效果图：



代码:

[java] view
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package com.example.demo_shareactionprovider;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.ShareActionProvider;

public class MainActivity extends Activity {

ShareActionProvider provider = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

// Get the ActionProvider

provider = (ShareActionProvider) menu.findItem(R.id.menu_share)

.getActionProvider();

// Initialize the share intent

Intent intent = new Intent(Intent.ACTION_SEND);

intent.setType("text/plain");

intent.putExtra(Intent.EXTRA_TEXT, "Text I want to share");

provider.setShareIntent(intent);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case R.id.menu_share:

break;

default:

break;

}

return super.onOptionsItemSelected(item);

}

}

/res/menu/activity_main.xml

[html] view
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<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item

android:id="@+id/menu_share"

android:actionProviderClass="android.widget.ShareActionProvider"

android:showAsAction="ifRoom"

android:title="Share"/>

<item

android:id="@+id/item1"

android:icon="@android:drawable/ic_menu_call"

android:showAsAction="ifRoom"

android:title="">

</item>

</menu>

The ShareActionProvider now handles all user interaction with the item and you do not need to handle click events from the onOptionsItemSelected() callback method.

上面是官方文档上给的: 就是说无需在onOptionsItemSelected()这个回调方法中再去处理了。

代码：Demo_ShareActionProvider

Action Bar 之 style

你可以用android的style和theme来自定义action bar的风格和主题

android:windowActionBarOverlay 这个属性是用来定义actionbar和其下方视图的位置关系的。默认false，当设置成true时，表示activity layout 就是说你的下方的视图将覆盖整个屏幕。这样设置的好处就是说，当你隐藏action bar的时候，视图不会改变位置。当我们把action bar设置成半透明的时候，我们也能看见其下面的内容，这样的界面对用户来说更加有好。

<SomeView android:layout_marginTop="?android:attr/actionBarSize" />

上面这个属性可以设置activity layout距离屏幕顶端的距离。这样设置可以防止被action bar覆盖下方内容。

下面是一个简单的关于如何改变antion bar 字体、分割图片、背景的一个style

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<resources>

<!-- the theme applied to the application or activity -->

<style name="CustomActivityTheme" parent="@android:style/Theme.Holo">

<item name="android:actionBarTabTextStyle">@style/CustomTabTextStyle</item>

<item name="android:actionBarDivider">@drawable/ab_divider</item>

<item name="android:actionBarItemBackground">@drawable/ab_item_background</item>

</style>

<!-- style for the action bar tab text -->

<style name="CustomTabTextStyle" parent="@android:style/TextAppearance.Holo">

<item name="android:textColor">#2456c2</item>

</style>

</resources>

能设置的关于action bar的风格（style）的属性有：

android:actionButtonStyle // Defines a style resource for the action item buttons.

android:actionBarItemBackground //Defines a drawable resource for each action item's background. (Addedin API level 14.)

android:itemBackground // Defines a drawable resource for each overflow menu item's background.

android:actionBarDivider // Defines a drawable resource for the divider between action items.(Added in API level 14.)

android:actionMenuTextColor //Defines a color for text that appears in an action item.

android:actionMenuTextAppearance //Defines a style resource for text that appears in an action item.

android:actionBarWidgetTheme //Defines a theme resource for widgets that are inflated into the actionbar as action views. (Added in API level 14.)

下面的网址是源码中的styles.xml和themes.xml文件，包含了系统中所有的样式和主题。根据自己的需要可以改变action bar的显示风格。

https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/res/res/values/styles.xml
https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/core/res/res/values/themes.xml
例子1：怎么改变tab的字体大小、字体颜色等

[html] view
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<pre name="code" class="html">在themes.xml文件中关于tab的属性有：</pre><br>

<br>

<pre></pre>

<pre name="code" class="html">android:actionBarTabStyle // Defines a style resource for tabs in the action bar.</pre>android:actionBarTabBarStyle // Defines a style resource for the thin bar that appears below the navigation tabs.<br>

android:actionBarTabTextStyle //Defines a style resource for text in the navigation tabs.

<p><br>

</p>

<p>在themes.xml文件中找到：</p>

<p></p>

<p></p>

<pre name="code" class="html"><itemnameitemname="actionBarTabTextStyle">@style/Widget.Holo.Light.ActionBar.TabText</item></pre>

<p></p>

<p>在style.xml文件中找到</p>

<pre name="code" class="html"><style name="Widget.Holo.Light.ActionBar.TabText" parent="Widget.Holo.ActionBar.TabText">

</pre>

<p><br>

</p>

在style.xml文件中通过Widget.Holo.ActionBar.TabText，我们可以找到下面<br>

<pre name="code" class="html"><style name="Widget.Holo.ActionBar.TabText" parent="Widget.ActionBar.TabText">

<item name="android:textAppearance">@style/TextAppearance.Holo.Medium</item>

<item name="android:textColor">?android:attr/textColorPrimary</item>

<item name="android:textSize">12sp</item>

<item name="android:textStyle">bold</item>

<item name="android:textAllCaps">true</item>

<item name="android:ellipsize">marquee</item>

<item name="android:maxLines">2</item>

</style>

</pre>

<p><br>

</p>

<p>下面是我们工程中styles.xml的内容:<br>

</p>

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>

<resources xmlns:android="http://schemas.android.com/apk/res/android">

<style name="CustomActivityThemo" parent="@android:style/Theme.Holo.Light">

<item name="android:actionBarTabTextStyle">@style/CustomTabTextStyle</item>

</style>

<style name="CustomTabTextStyle" parent="@android:style/Widget.ActionBar.TabText">

<item name="android:textSize">25sp</item>

<item name="android:textColor">#FF0000</item>

<item name="android:textStyle">italic|bold</item>

</style>

</resources>

</pre><br>

我们必须在manifest.xml文件中的activity标签中设置<br>

<br>

<p></p>

<pre name="code" class="html"><activity

<span style="white-space:pre"> </span>android:theme="@style/CustomActivityThemo" ></pre><pre name="code" class="html"><span style="white-space:pre"> </span>....

</activity>

</pre>

<p></p>

<p><br>

</p>

代码：Demo_ActionBarTabsColor<br>

<p><br>

</p>

<p>例子2：改变action bar中tab的indicator（下面的那条横线）的颜色<br>

styles.xml文件内容:</p>

<p><br>

</p>

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>

<resources xmlns:android="http://schemas.android.com/apk/res/android">

<!-- the theme applied to the application or activity -->

<style name="CustomActivityTheme" parent="@android:style/Theme.Holo.Light">

<item name="android:actionBarTabTextStyle">@style/CustomTabTextStyle</item>

<item name="android:actionBarTabBarStyle">@android:color/holo_orange_dark</item>

<item name="android:actionBarTabStyle">@style/ActionBarTabStyle.Example</item>

</style>

<!-- style for the action bar tab text -->

<style name="CustomTabTextStyle" parent="@android:style/TextAppearance.Holo">

<item name="android:textColor">#2456c2</item>

</style>

<style name="ActionBarTabStyle.Example" parent="@android:style/Widget.Holo.Light.ActionBar.TabView">

<item name="android:background">@drawable/tab_indicator_ab_example</item>

</style>

</resources>

</pre><br>

<br>

<p></p>

<p>android:background这个属性定义了tab的显示风格，对应的是一个xml文件不是图片<br>

</p>

<p></p>

<p><br>

</p>

<p><br>

</p>

<p>tab_indicator_ab_example.xml文件的内容：</p>

<p></p>

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<!-- Non focused states -->

<item android:drawable="@android:color/transparent" android:state_focused="false" android:state_pressed="false" android:state_selected="false"/>

<item android:drawable="@drawable/tab_selected_example" android:state_focused="false" android:state_pressed="false" android:state_selected="true"/>

<!-- Focused states -->

<item android:drawable="@drawable/tab_unselected_focused_example" android:state_focused="true" android:state_pressed="false" android:state_selected="false"/>

<item android:drawable="@drawable/tab_selected_focused_example" android:state_focused="true" android:state_pressed="false" android:state_selected="true"/>

<!-- Pressed -->

<!-- Non focused states -->

<item android:drawable="@drawable/tab_unselected_pressed_example" android:state_focused="false" android:state_pressed="true" android:state_selected="false"/>

<item android:drawable="@drawable/tab_selected_pressed_example" android:state_focused="false" android:state_pressed="true" android:state_selected="true"/>

<!-- Focused states -->

<item android:drawable="@drawable/tab_unselected_pressed_example" android:state_focused="true" android:state_pressed="true" android:state_selected="false"/>

<item android:drawable="@drawable/tab_selected_pressed_example" android:state_focused="true" android:state_pressed="true" android:state_selected="true"/>

</selector>

</pre><pre name="code" class="html"></pre>代码：Demo_ActionBarTabsColor<p></p><p>参考文献：</p><p>http://www.vogella.com/articles/AndroidActionBar/article.htmlhttp://developer.android.com/guide/topics/ui/actionbar.html</p><p></p>

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